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US 4,046,053 AGranted
Blind rivet
AssigneeAerpat A.G.
InventorsZia Raheem Alvi, William David Bradley, Keith Denham, Frederick Arthur Summerlin
Life of this patent
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AssigneeAerpat A.G.
InventorsZia Raheem Alvi, William David Bradley, Keith Denham, Frederick Arthur Summerlin
Estimating the term…
A blind rivet for fastening apertured sheets comprises a tubular shell having a head at one end, and a mandrel having an enlarged head which when pulled into the bore of the shell deforms the shell to produce a blind head. The mandrel has a breaker groove at which it breaks when the rivet is fully placed, leaving the mandrel head plugging the shell. The mandrel head has an integral peripheral skirt which can be deformed outwardly by a tool used for placing the rivet, so that the skirt engages the shell and prevents the mandrel head from being pushed out of the bore of the shell. The mandrel head is adapted to wiredraw after the blind head has been formed so that the mandrel will break substantially flush with the head of the shell when fastening either thick or thin sheets.
A blind rivet comprising a tubular shell having a bore throughout its length, and a mandrel, said mandrel comprising an elongate stem and an enlarged head and having a breaker groove at the junction of the stem and head, the head of the mandrel having a part adjacent to the breaker groove, said part comprising a core having an external diameter at least as great as the diameter of the stem, and a skirt peripherally surrounding said core, said skirt and said core presenting a common face defining a side of said breaker groove and facing towards the stem, said mandrel head being adapted to radially expand said tubular shell and thereby form a blind head when pulled into the bore of the shell, and said skirt being deformable outwardly into engagement with the shell to assist in locking the mandrel head in the expanded shell.
A blind rivet comprising:
Dependencies are inferred from the claim text.